Short Rage Wireless Music Transmitter

Introduction: Short Rage Wireless Music Transmitter

Now , i am with a short range wireless FM transmitter which can powered through USB. It can take audio signals and transmit it over a short . It's maximum rage is around 100- 150 meters.you can easily listen it over a radio . it's very cheap and easy to build.

Step 1: Fetching Parts

All you need are some common electronic components. You can buy them at Radio Shack!

1. Transistor BC 548 OR 2N2219a.

2.Capacitors : 1n , 1n , 10p , 10p variable , 1uF electrolytic.

3. Resistors : 2k7 or 2.7 k , 1k , 10k , 10 variable.

4. Inductor : you can make by yourself . 7 turns on 3mm or 6 turns3mm.

5. Battery : 9 volt .

6. PCB you have to make one or use breadboard.

7. Antenna 10 cm long!

8. Nothing else

Step 2: Circuit Diagram

Here is the simple circuit diagram!

Step 3: PCB - LAYOUT

Here is the PCB layout. In the next PCB the red ones are capacitors , green ones are resistors , brown one is variable resistor , white one is transistor , yellow one is inductor and other holes are for power and input and antenna. TO make this PCB at home you have to follow this link : ""https://www.instructables.com/id/DIY-Printed-circuit-board/"".

hey.. firstly i want to thank you for this amazing build.. i wanted to know how much power does it transmit over the antenna.. because in my country, transmitting over 500mA is considered illegal and i don't wanna break any rules.

Oh dear lord! Let me explain this: The receiver circuit given in this instructable does not have a fixed transmitting frequency. The frequency of transmission can be controlled by changing the value of C2 which is a variable capacitor ! Just change the value of the capacitor and the frequency of transmission changes respectively. Hope this clears you doubt if not tell me and explain your problem well! Thanks for Commenting! I like people who make me angry by asking questions!